CN219978078U - Constant flow hole and suction resistance standard rod period detection device and equipment - Google Patents
Constant flow hole and suction resistance standard rod period detection device and equipment Download PDFInfo
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- CN219978078U CN219978078U CN202320977461.9U CN202320977461U CN219978078U CN 219978078 U CN219978078 U CN 219978078U CN 202320977461 U CN202320977461 U CN 202320977461U CN 219978078 U CN219978078 U CN 219978078U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The utility model discloses a period detection device and equipment for a constant flow hole and a suction resistance standard rod, wherein the device comprises a constant flow hole period detection system and a suction resistance standard rod period detection system, and the constant flow hole period detection system and the suction resistance standard rod period detection system share a negative pressure generator, a differential pressure meter, a thermometer, an barometer and a processing system; the processing system is used for calculating the flow of the constant flow hole to be detected according to the data measured by the differential pressure gauge, the thermometer and the barometer and judging whether the flow of the constant flow hole to be detected meets the standard; and comparing the suction resistance value of the suction resistance standard rod to be detected with the suction resistance standard value of the suction resistance standard rod with the detected specification so as to detect the constant flow hole and the suction resistance standard rod in a period. The utility model has high integration level, can switch and detect the constant flow hole and the suction resistance standard rod, and eliminates the influence caused by the deviation of the constant flow hole or the suction resistance standard rod in the production process.
Description
Technical Field
The utility model relates to the technical field of cigarette equipment, in particular to a period detection device and equipment for a constant flow hole and a suction resistance standard rod.
Background
The special tobacco suction resistance standard rod is a standard instrument used on a special tobacco suction resistance tester. The verification of the special tobacco suction resistance standard rod is to measure the pressure difference value of two ends of the special tobacco suction resistance standard rod in the gas path under the condition that the gas flow is (17.5+/-0.3) mL/s, and the detection value of the special tobacco suction resistance standard rod is obtained through calculation.
The constant flow hole CFO (Critical Flow Orifice) special for tobacco is a standard instrument used on various special detection instruments for tobacco, such as a suction resistance tester, a ventilation rate tester, a smoking machine suction curve tester and the like, and is mainly used for keeping the gas flow constant to be in accordance with the measurement requirement.
In addition, the calibration process of the suction resistance standard rod and the constant flow hole needs to be disassembled and sent to a special mechanism for detection, the detection and calibration period is generally one year/time, the interval period is too long, the stability of the suction resistance standard rod and the constant flow hole during the twice calibration period of one year cannot be ensured, therefore, the suction resistance standard rod and the constant flow hole need to be detected during the regular period in the daily use process, the air flow in the air channel is ensured to be stable within the range of the measurement requirement, and the actual detection value and the verification value of the suction resistance standard rod are determined to not have great difference.
The suction resistance tester can be used for measuring the suction resistance standard rod, but due to the existence of pipeline pressure drop between a measuring head of the suction resistance tester and a constant flow hole and the difference of working principles, the accurate measurement of the suction resistance standard rod cannot be realized.
Thus, there is a need for a device for performing a period test on a constant flow orifice and a resistance stick to accommodate the co-test of the constant flow orifice and the resistance stick.
Disclosure of Invention
The utility model aims to provide a period detection device and device for a constant flow hole and a suction resistance standard rod, so as to solve the technical problems in the background technology.
The technical scheme adopted by the utility model is as follows:
the constant flow rate hole and suction resistance standard rod period detection device comprises a constant flow rate hole period detection system for detecting a constant flow rate hole and a suction resistance standard rod period detection system for detecting a suction resistance standard rod, wherein the constant flow rate hole period detection system and the suction resistance standard rod period detection system share a negative pressure generator, a differential pressure meter, a thermometer, an barometer and a processing system;
the constant flow rate hole period detection system comprises a negative pressure generator, a constant flow rate hole clamp for installing a constant flow rate hole to be detected, a dryer, a mass flowmeter, a differential pressure meter, a thermometer, an atmospheric pressure meter and a processing system, wherein the negative pressure generator, the constant flow rate hole clamp, the dryer and the mass flowmeter are sequentially arranged;
the detection system comprises a negative pressure generator, a constant flow hole, a filter, a suction resistance standard rod clamp for installing the suction resistance standard rod, a differential pressure gauge, a thermometer, an barometer and a processing system, wherein the negative pressure generator, the constant flow hole, the filter and the suction resistance standard rod clamp are sequentially arranged;
when detecting the constant flow hole, the negative pressure generator is connected with the constant flow hole clamp, and the pressure difference meter is connected between the dryer and the constant flow hole to be detected and used for measuring the pressure difference between the constant flow hole to be detected and the atmosphere; when the suction resistance standard rod is detected, the negative pressure generator is connected with a constant flow hole, and the pressure difference meter is connected between the filter and the suction resistance standard rod clamp and used for measuring the pressure difference between the suction resistance standard rod clamp and the atmosphere so as to realize detection of the constant flow hole or the suction resistance standard rod.
As a further technical scheme, sealing rings are arranged in the suction resistance standard rod clamp and the constant flow hole clamp.
As a further technical scheme, the sealing ring is a rubber diaphragm.
As a further technical scheme, the negative pressure generator is respectively communicated with the constant flow hole clamp and the constant flow hole through the tee joint; the differential pressure gauge is connected between the drier and the constant flow hole clamp or between the filter and the suction resistance standard rod clamp through a three-way interface.
Meanwhile, the utility model also provides a period detection device for the constant flow hole and the suction resistance standard rod, which comprises the period detection device for the constant flow hole and the suction resistance standard rod, a case and a computer display arranged above the case,
the chassis is provided with a detection switch, a first change-over switch, a second change-over switch, a suction resistance standard rod clamp and a constant flow hole clamp, wherein the detection switch is used for connecting compressed air with a negative pressure generator to generate negative pressure; the first switching valve is connected with one end of the first switching switch and is used for controlling the other end of the first switching valve to carry out connection switching so as to be communicated with a constant flow hole or a constant flow hole clamp; the second change-over switch is connected with a second change-over valve, one end of which is connected with the differential pressure gauge, and the second change-over valve is used for controlling the other end of the second change-over valve to be connected between the suction resistance standard rod clamp and the filter or between the constant flow hole clamp and the dryer.
As a further technical scheme, the compressed air is further connected with the negative pressure generator through a connecting valve, the connecting valve is arranged at the rear side of the case, and the connecting valve is controlled through a detection switch.
As a further technical scheme, the chassis is further provided with a positive pressure meter and a negative pressure meter, wherein the positive pressure meter is connected with the introduced atmosphere and is used for displaying the pressure value of positive pressure gas; the negative pressure meter is connected with the introduced compressed air and is used for displaying the pressure value of the negative pressure gas.
Advantageous effects
The utility model can integrate the regular detection of the constant flow hole and the suction resistance standard rod, and eliminate the influence caused by the deviation of the constant flow hole or the suction resistance standard rod in the production process;
the dryer is arranged to remove moisture in the atmosphere, so that the constant flow hole to be tested is prevented from being damaged due to the entry of the moisture, and the quality of the constant flow hole to be tested is ensured; the quality of the constant flow hole can be guaranteed through setting up the filter, avoid leading to the fact the jam to the constant flow hole in the testing process, influence the detection accuracy of inhaling the standard stick that hinders to promote detection effect.
In addition, through set up the sealing washer in constant flow hole anchor clamps and inhale the standard rod anchor clamps that hinder, the sealing washer adopts the rubber diaphragm, can prevent that constant flow hole anchor clamps and inhale and hinder the standard rod anchor clamps in and communicate with the air, can guarantee again that inhale and hinder the air current circulation that the standard rod inserted and hinder standard rod anchor clamps, constant flow hole insert constant flow hole anchor clamps.
Drawings
FIG. 1 is a schematic diagram of a constant flow rate orifice and suction resistance calibration rod period detection device in example 1;
FIG. 2 is a graph showing the relationship between the air compressibility factor and the temperature and absolute pressure of the constant flow rate orifice jig or the constant flow rate orifice in the actual case of example 1;
FIG. 3 is a schematic diagram showing the structure of a device for detecting the duration of a constant flow rate hole and a standard rod for suction resistance in example 2;
FIG. 4 is a schematic diagram showing the structure of a differential pressure gauge in embodiment 2;
fig. 5 is a schematic structural view of a mass flowmeter in embodiment 2;
FIG. 6 is an external view structural diagram of a constant flow rate orifice jig in example 3;
FIG. 7 is a sectional perspective view of a constant flow orifice fixture in example 3;
fig. 8 is a schematic sectional structure of a constant flow rate orifice jig in example 3.
Illustration of:
1. a chassis; 2. a computer display; 3. a positive pressure gauge; 4. a negative pressure meter; 5. a first changeover switch; 6. a detection switch; 7. a standard rod clamp for suction resistance; 8. constant flow orifice fixture; 9. a second change-over switch; 10. a differential pressure gauge; 11. a mass flowmeter; 81. a base; 82. a pressing ring at the upper part; 83. an upper cover; 84. a constant flow orifice; 85. a rubber membrane; o-ring seal.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
On the contrary, the utility model is intended to cover any alternatives, modifications, equivalents, and variations as may be included within the spirit and scope of the utility model as defined by the appended claims. Further, in the following detailed description of the present utility model, certain specific details are set forth in order to provide a better understanding of the present utility model. The present utility model will be fully understood by those skilled in the art without the details described herein.
Example 1
Referring to fig. 1, a constant flow rate hole and suction resistance standard rod period detection device comprises a constant flow rate hole period detection system and a suction resistance standard rod period detection system, wherein the constant flow rate hole period detection system and the suction resistance standard rod period detection system share a negative pressure generator, a differential pressure meter, a thermometer, an barometer, a processing system and the like, so that the constant flow rate hole and the suction resistance standard rod are detected respectively through the period detection device.
Specifically, the constant flow orifice period detection system comprises a negative pressure generator, a constant flow orifice clamp used for installing a constant flow orifice to be detected, a dryer, a mass flowmeter, a differential pressure meter, a thermometer, an barometer, a processing system and the like, wherein the negative pressure generator, the constant flow orifice clamp, the dryer and the mass flowmeter are sequentially arranged, the constant flow orifice to be detected is installed on the constant flow orifice clamp, the negative pressure required by the constant flow orifice to be detected is generated through the negative pressure generator, the mass flowmeter measures the upstream mass flow of the constant flow orifice, the differential pressure between the downstream of the mass flowmeter and the atmosphere is measured by the differential pressure meter, the ambient temperature and the barometer measure the ambient pressure, and the upstream volume flow of the constant flow orifice is converted into the measurement result of the flow orifice flow value through the processing system.
Further, in the constant flow rate hole period detection system, a positive pressure port of the negative pressure generator is connected with compressed air, a negative pressure port of the negative pressure generator is connected with an air outlet of the constant flow rate hole clamp so as to provide negative pressure required by normal operation for the constant flow rate hole, and an air outlet of the negative pressure generator is connected with the atmosphere. The air inlet of the constant flow hole clamp is connected with the air outlet of the dryer, the air inlet of the dryer is connected with the air inlet of the mass flowmeter, and the air inlet of the mass flowmeter is connected with the atmosphere. In this embodiment, the compressed air is generated by a compressor or a compressed air source, and is connected to the positive pressure end of the negative pressure generator to provide an air source for the negative pressure generator. A dryer is connected in series between an air inlet of the constant flow hole clamp and an air outlet of the mass flowmeter, and moisture in the atmosphere is removed through the dryer, so that the constant flow hole to be detected is prevented from being damaged due to the entry of moisture; the differential pressure gauge is arranged between the constant flow hole clamp and the dryer and is positioned at the air inlet of the constant flow hole clamp and used for measuring the differential pressure between the air inlet of the constant flow hole and the atmosphere.
The detection system during the standard rod of the suction resistance comprises a negative pressure generator, a constant flow hole, a filter, a standard rod clamp of the suction resistance for installing the standard rod of the suction resistance, a differential pressure meter, a thermometer, an barometer and a processing system, and the negative pressure generator, the constant flow hole, the filter and the standard rod clamp of the suction resistance are sequentially arranged; in this embodiment, the air outlet end of the suction resistance standard rod is inserted into the suction resistance standard rod fixture and sealed by the sealing ring, so as to improve the detection accuracy of the detection device during the suction resistance standard rod.
Further, in the detection system during the standard rod of the suction resistance, a positive pressure port of the negative pressure generator is connected with compressed air, a negative pressure port of the negative pressure generator is connected with an air outlet of the constant flow hole, negative pressure required by normal operation is provided for the constant flow hole, and an air outlet of the negative pressure generator is connected with the atmosphere. The air inlet of the constant flow hole is connected with the air outlet of the filter, the air inlet of the filter is connected with the air outlet of the suction resistance standard rod clamp, and the filter is arranged between the constant flow hole and the suction resistance standard clamp, so that various tobacco shred impurities can not enter the constant flow hole; the air outlet of the suction resistance standard rod is inserted into the suction resistance standard rod clamp, and the air inlet end of the suction resistance standard rod in the suction resistance standard rod clamp is connected with the atmosphere; the differential pressure gauge is arranged between the filter and the suction resistance standard rod clamp.
In the embodiment, a negative pressure generator of a constant flow rate hole and suction resistance standard rod period detection device performs system selection according to detected equipment, when a constant flow rate hole period detection system is selected, a negative pressure port of the negative pressure generator is connected with an air outlet of a constant flow rate hole clamp for installing a constant flow rate hole to be detected, and a differential pressure meter is connected between an air inlet of the constant flow rate hole clamp and an air outlet of a dryer; when the detection system is selected as the suction resistance standard rod period detection system, connecting a negative pressure port of a negative pressure generator with an air outlet of a constant flow hole, and connecting a differential pressure meter between an air outlet end of a suction resistance standard rod clamp and a filter; preferably, the negative pressure port of the negative pressure generator can be communicated with the constant flow hole clamp and the constant flow hole through the tee joint, and the differential pressure gauge can also be respectively communicated with the constant flow hole period detection system and the suction resistance standard rod period detection system through the tee joint.
In addition, a period detection method of the constant flow hole and the suction resistance standard rod is provided, of course, the detection can be performed by other modes, and the specific steps are as follows:
s1, when a constant flow hole is required to be detected, a detection system is communicated with the constant flow hole period, a pressure difference P1 between the atmosphere measured by a pressure difference meter and the constant flow hole to be detected is collected, an atmospheric absolute pressure P2 measured by an atmospheric pressure meter is calculated to obtain an air inlet pressure P of the constant flow hole to be detected, and a calculation formula is as follows: p=p2-P1;
s2, collecting the atmospheric temperature T measured by a thermometer;
s3, the processing system calculates the flow Q of the constant flow hole to be detected according to the following formula by using the acquired data (P,T) Judging the flow Q of a constant flow hole to be detected (P,T) Whether within the standard flow range of the constant flow orifice of the detected specification to achieve the period detection of the constant flow orifice.
Wherein P is N The atmospheric pressure under the standard condition is generally 101325Pa; t (T) N Taking 273.15K as the temperature under the standard condition; q (Q) N Is the flow under standard conditions; z is Z N The gas compressibility factor of air is 0.99941, which is the gas compressibility factor under standard conditions; p is the air inlet pressure of the constant flow orifice to be detected; t is the air temperature of the air inlet of the constant flow hole to be detected under the actual condition, and is the same as the atmospheric temperature, namely the atmospheric temperature measured by the thermometer; z is Z (P,T) The air compressibility factor of the air outlet of the constant flow hole to be detected under the actual condition is dimensionless and can be obtained through table lookup with reference to fig. 2.
S4, when the suction resistance standard rod is required to be detected, detecting during the period of communicating the suction resistance standard rodThe measuring system opens the negative pressure gas path and starts timing, and after 10min, the pressure difference P3 between the atmosphere measured by the pressure difference meter and the air outlet of the standard rod to be detected is collected, the atmospheric absolute pressure P2 measured by the atmospheric pressure meter, and the atmospheric temperature T measured by the thermometer, wherein the pressure difference P3 is the suction resistance value PD of the standard rod to be detected under the atmospheric temperature T and the atmospheric absolute pressure P2 Meas 。
S5, the processing system compares the suction resistance value of the suction resistance standard rod to be detected with the suction resistance standard value of the suction resistance standard rod with the detected specification by utilizing the acquired data, if the relative error is within 1%, the suction resistance standard rod is qualified, and if the relative error is not qualified, the suction resistance standard rod is not qualified, so that the detection of the suction resistance standard rod in a period is realized.
When the processing system compares the suction resistance value with the suction resistance standard value by using the acquired data, the processing system corrects the suction resistance value of the suction resistance standard rod to be detected according to the corresponding correction formula because the atmospheric temperature T and the atmospheric absolute pressure P2 actually influence the suction resistance value of the suction resistance standard rod, so as to ensure the detection accuracy of the suction resistance standard rod during the period.
For PD Meas And (5) performing correction. The formula is as follows:
α＝ΔT×(a 1 +a 2 ×PD Meas )+ΔP atm ×(a 3 +a 4 ×PD Meas )+a 5 ×ΔRH+a 6 ×(ΔP atm ) 2 ；
wherein: PD is the corrected suction resistance value, and the unit Pa; a is a correction coefficient under different temperature and humidity and atmospheric pressure conditions; PD (potential difference) device Meas Is the measured value of the absorption resistance, unit mmWG; delta T is the difference between the measured temperature and 22 ℃ in units of ℃; ΔP atm The unit mmWG is the difference between the measured atmospheric pressure and 101325Pa; ΔRH is the difference between the measured relative humidity and 60% RH in% RH; a, a 1 ＝-2.404×10-1；a 2 ＝-2.240×10-5；a 3 ＝-2.891×10-3；a 4 ＝-6.678×10-6；a 5 ＝-2.707×10-3；a 6 ＝7.386×10-6。
And comparing the corrected suction resistance value PD with the standard suction resistance value of the suction resistance standard rod to realize the verification of the suction resistance standard rod.
Example 2
Referring to fig. 3-5, a period detection device for a constant flow hole and a suction resistance standard rod comprises a case 1 and a computer display 2 arranged above the case, wherein a positive pressure meter 3, a negative pressure meter 4, a first change-over switch 5, a detection switch 6, a suction resistance standard rod clamp 7, a constant flow hole clamp 8 and a second change-over switch 9 are arranged on the case 1, an barometer, a thermometer and a mass flowmeter 11 are arranged outside the case 1, a constant flow hole period detection system and residual components of the suction resistance standard rod period detection system are arranged in the case 1, for example: the negative pressure generator, the constant flow hole, the differential pressure gauge 10, the dryer, the filter and the like are arranged in the case.
Wherein, the externally introduced positive pressure gas, namely, one end of the atmosphere is connected with a positive pressure meter 11, the pressure value of the atmosphere is displayed through the positive pressure meter, and whether the positive pressure gas meets the pressure requirement is prompted; the negative pressure gas introduced from the outside is connected with a negative pressure generator, negative pressure is generated by the negative pressure generator through positive pressure, the negative pressure gas is connected with a negative pressure meter 4, the negative pressure value of the negative pressure gas is displayed through the negative pressure meter, and whether the negative pressure gas meets the pressure requirement is prompted; one end of the first switching valve is connected with the negative pressure generator, and the other end of the first switching valve is connected and switched through the first switching switch so as to be communicated with an internal constant flow hole or an external constant flow hole clamp, so that the interlocking of a detection system during the constant flow hole and a gas circuit of a detection system during the standard rod of suction resistance is realized; the detection switch 6 is connected with the connection between the compressed air and the negative pressure generator to generate negative pressure; one end of the suction resistance standard rod clamp connected with the filter is also connected with a differential pressure gauge through a three-way joint, and the differential pressure gauge 10 can also be arranged outside the case. One end of the differential pressure gauge is connected with a second switching valve, the other end of the differential pressure gauge is connected with an air outlet of the suction resistance standard rod clamp 7 or an air inlet of the constant flow hole clamp 8, and the second switching valve is subjected to connection switching control through a second switching switch; the case is used as a structural main body of the detection equipment during the whole period; the computer display is used for man-machine interaction. Preferably, sealing rings are arranged in the suction resistance standard rod clamp 7 and the constant flow rate hole clamp 8, and the suction resistance standard rod clamp 7 and the constant flow rate hole clamp 8 are isolated from the outside through the sealing rings.
Further, compressed air is also connected with the negative pressure generator through a connecting valve, and the connecting valve is arranged at the rear side of the case and is controlled through a detection switch.
The utility model can realize the regular detection of the constant flow hole and the suction resistance standard rod, and eliminate the influence caused by the deviation of the constant flow hole or the suction resistance standard rod in the production process; the dryer is arranged to remove moisture in the atmosphere, so that the constant flow hole to be tested is prevented from being damaged due to the entry of the moisture, and the quality of the constant flow hole to be tested is ensured; the quality of the constant flow hole can be guaranteed through setting up the filter, avoid leading to the fact the jam to the constant flow hole in the testing process, influence the detection accuracy of inhaling the standard stick that hinders to promote detection effect. In addition, through set up the sealing washer in constant flow hole anchor clamps and inhale the standard rod anchor clamps that hinder, the sealing washer adopts the rubber diaphragm, can prevent that constant flow hole anchor clamps and inhale and hinder the standard rod anchor clamps in and communicate with the air, can guarantee again that inhale and hinder the air current circulation that the standard rod inserted and hinder standard rod anchor clamps, constant flow hole insert constant flow hole anchor clamps.
Example 3
Referring to fig. 6 to 8, a constant flow hole fixture for a constant flow hole period checking device is provided, which comprises a base 81 with a through hole therein, an upper pressing ring 82 and an upper cover 83, wherein the constant flow hole 84 is arranged in the through holes of the base, the upper pressing ring and the upper cover, the upper cover is covered with the base, the upper pressing ring is arranged between the upper cover and the base and is respectively propped against the upper cover and the base, and an air inlet of the constant flow hole fixture is formed at one end of the base far away from the upper pressing ring and is used for being connected with a dryer and a mass flowmeter; one end of the upper cover, which is far away from the upper pressing ring, is provided with an air outlet of the constant flow hole clamp and is used for being connected with a negative pressure generator. Preferably, the base and the upper cover can be connected in a pluggable manner, and at least one O-shaped sealing ring 86 is arranged between the outer side of the base and the upper cover so as to ensure the air tightness of the constant flow hole clamp.
Further, be provided with the rubber diaphragm 85 in the through-hole of base, and the rubber diaphragm offsets with top clamping ring tip, and top clamping ring passes through threaded connection with the base, presses the rubber diaphragm in the base, and the rubber diaphragm setting is passed to constant flow hole one end tip, carries out elastic seal to constant flow hole one end in the base through the rubber diaphragm, guarantees that the air current flows through from constant flow hole only.
Preferably, the constant flow orifice is disposed perpendicular to the air inlet of the constant flow orifice fixture.
According to the constant flow hole fixture, the rubber diaphragm is arranged to adapt to checking and positioning of constant flow holes with various specifications, and the O-shaped sealing ring and the rubber diaphragm are arranged to ensure the air tightness of the constant flow holes, so that a guarantee is provided for checking the constant flow holes.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (7)
1. The device for detecting the period of the constant flow hole and the suction resistance standard rod is characterized by comprising a constant flow hole period detection system for detecting the constant flow hole and a suction resistance standard rod period detection system for detecting the suction resistance standard rod, wherein the constant flow hole period detection system and the suction resistance standard rod period detection system share a negative pressure generator, a differential pressure meter, a thermometer, an barometer and a processing system;
the constant flow rate hole period detection system comprises a negative pressure generator, a constant flow rate hole clamp for installing a constant flow rate hole to be detected, a dryer, a mass flowmeter, a differential pressure meter, a thermometer, an atmospheric pressure meter and a processing system, wherein the negative pressure generator, the constant flow rate hole clamp, the dryer and the mass flowmeter are sequentially arranged;
the detection system comprises a negative pressure generator, a constant flow hole, a filter, a suction resistance standard rod clamp for installing the suction resistance standard rod, a differential pressure gauge, a thermometer, an barometer and a processing system, wherein the negative pressure generator, the constant flow hole, the filter and the suction resistance standard rod clamp are sequentially arranged;
when detecting the constant flow hole, the negative pressure generator is connected with the constant flow hole clamp, and the pressure difference meter is connected between the dryer and the constant flow hole to be detected and used for measuring the pressure difference between the constant flow hole to be detected and the atmosphere; when the suction resistance standard rod is detected, the negative pressure generator is connected with a constant flow hole, and the pressure difference meter is connected between the filter and the suction resistance standard rod clamp and used for measuring the pressure difference between the suction resistance standard rod clamp and the atmosphere so as to realize detection of the constant flow hole or the suction resistance standard rod.
2. The device for detecting the duration of a constant flow rate hole and a suction resistance standard rod according to claim 1, wherein sealing rings are arranged in the suction resistance standard rod clamp and the constant flow rate hole clamp.
3. The device for detecting the duration of a constant flow orifice and a standard rod for resistance to suction according to claim 2, wherein the sealing ring is a rubber diaphragm.
4. The device for detecting the period of the constant flow rate hole and the suction resistance standard rod according to claim 1, wherein the negative pressure generator is respectively communicated with the constant flow rate hole clamp and the constant flow rate hole through three-way interfaces; the differential pressure gauge is connected between the drier and the constant flow hole clamp or between the filter and the suction resistance standard rod clamp through a three-way interface.
5. A constant flow hole and suction resistance standard rod period detection device, comprising a constant flow hole and suction resistance standard rod period detection device according to any one of claims 1-4, characterized by further comprising a case and a computer display arranged above the case,
the chassis is provided with a detection switch, a first change-over switch, a second change-over switch, a suction resistance standard rod clamp and a constant flow hole clamp, wherein the detection switch is used for connecting compressed air with a negative pressure generator to generate negative pressure; the first switching valve is connected with one end of the first switching switch and is used for controlling the other end of the first switching valve to carry out connection switching so as to be communicated with a constant flow hole or a constant flow hole clamp; the second change-over switch is connected with a second change-over valve, one end of which is connected with the differential pressure gauge, and the second change-over valve is used for controlling the other end of the second change-over valve to be connected between the suction resistance standard rod clamp and the filter or between the constant flow hole clamp and the dryer.
6. The device for detecting the duration of a constant flow orifice and a suction resistance standard rod according to claim 5, wherein the compressed air is further connected to a negative pressure generator through a connecting valve, the connecting valve is disposed at the rear side of the casing, and the connecting valve is controlled by a detecting switch.
7. The device for detecting the period of the constant flow hole and the suction resistance standard rod according to claim 5, wherein the case is further provided with a positive pressure meter and a negative pressure meter, and the positive pressure meter is connected with the introduced atmosphere and is used for displaying the pressure value of positive pressure gas; the negative pressure meter is connected with the introduced compressed air and is used for displaying the pressure value of the negative pressure gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320977461.9U CN219978078U (en) | 2023-04-26 | 2023-04-26 | Constant flow hole and suction resistance standard rod period detection device and equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320977461.9U CN219978078U (en) | 2023-04-26 | 2023-04-26 | Constant flow hole and suction resistance standard rod period detection device and equipment |
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| Publication Number | Publication Date |
|---|---|
| CN219978078U true CN219978078U (en) | 2023-11-07 |
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|---|---|---|---|
| CN202320977461.9U Active CN219978078U (en) | 2023-04-26 | 2023-04-26 | Constant flow hole and suction resistance standard rod period detection device and equipment |
Country Status (1)
| Country | Link |
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| CN (1) | CN219978078U (en) |
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2023
- 2023-04-26 CN CN202320977461.9U patent/CN219978078U/en active Active
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